If you want to hide the app from app drawer alone, you can use this method.

But if you want to hide the app completely, then this method is not the one I recommend for you.

Because here are the disadvantages of this method:

This method only hides the app from the app drawer only.

The hidden app shortcut on the home screen remains intact.

For instance:

You are hiding WhatsApp which has a shortcut on home screen. After you hidden the app with the launcher, you can still see the WhatsApp shortcut on the home screen and you can still access the WhatsApp from that shortcut.

Go to Settings > Apps > All tab and you can see the app you just hid.

In a nutshell, this method doesn't hide the app completely. But the next method will.